Re: [wxVTK] BadWindow (invalid Window parameter) - Race Condition?

[Mathieu M. <mat...@gm...>]

Very nice for looking into that issue. I remember this 'magic' --sync
option in the past help me find out a couple of bug in the wxGTK code.
Could you please open an issue in the bug tracker at:

http://sourceforge.net/tracker/?group_id=114757

And if possible enclose the cvs dif:

$ cvs -q -u3 -p diff

Thanks
Mathieu

On 6/8/06, Alexander Nip <ale...@gm...> wrote:
> Dear All,
>
> I would like to report what appears to be a race condition and a work
> around, just in case I am not alone. I apologize if this has been
> covered previously.
>
> I compiled the CVS version wxVTK on Fedora 4 and linked it dynamically
> to the latest versions of VTK and wxGTK. When I executed any of the
> sample programs, I would get the following X error and the program would
> exit normally:
>
> The program 'Sample' received an X Window System error.
> This probably reflects a bug in the program.
> The error was 'BadWindow (invalid Window parameter)'.
>    (Details: serial 7 error_code 3 request_code 2 minor_code 0)
>    (Note to programmers: normally, X errors are reported asynchronously;
>     that is, you will receive the error a while after causing it.
>     To debug your program, run it with the --sync command line
>     option to change this behavior. You can then get a meaningful
>     backtrace from your debugger if you break on the gdk_x_error()
> function.)
>
> However, everything worked just fine as soon as I used the "--sync"
> option. So I couldn't really get a useful backtrace from gdb. I did a
> little bit of debugging and found that the OnPaint method was fired
> prematurely (Skipping the first call and everything would work fine with
> or without the --sync switch). I did a bit of web searching and
> eventually solved the problem by sticking the following line right
> before the Render() call in the OnPaint() method:
>
>    this->SetCurrent();
>
> Does this lead to other side effects? At least all Sample programs are
> now working normally for me.
>
>
> Alex
>
>
>
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-- 
Mathieu